rotate items stored in a coll

dear all, here is what i’m trying to do: having a coll with say 10 addresses, i need to find a way to rotate of 1 position (up or down) only parts of the stored data for instance from position 3 to pos 8..hope it makes sense..
thanks
michele

>dear all, here is what i’m trying to do: having a coll with say 10
>addresses, i need to find a way to rotate of 1 position (up or down)
>only parts of the stored data for instance from position 3 to pos
>8..hope it makes sense..
>thanks
>michele